Cooling or heating tube



June 23, 1925. 7 1,542,842

v P. D. SCHENCK COOLING 0R HEATING TUBE Filed June 5, 1923 J INVENTOR Patented June 23, 1925.

UNITED STATES PATENT OFFICE.

PEIRGE D. SCI-IENCK, OF DAYTON, OHIO,'.ASSIGNOR TO'THE DURIRON COMPANY, A CORPORATION OF NEW YORK.

COOLING OR- HEATING TUBE.

Application filed June 5,

To all whom it may concern:

Be it known that I, PEIRCE D. ScHnNoK, a citizen of the United States, and a resi dent of Dayton, in the county of Montgomery and State of Ohio, have made a new and useful invention in Improvementsin Cooling or Heating Tubes, of which the following is a specification.

The invention relates to tubes designed for insertion into tanks or containers for the purpose of cooling or heating the contents, depending on the requirements of the case, and particularly to tubes of this char acter designed for use with corrosive liquids or gases. Such tubes must necessarily be of corrosion resisting compounds or alloys, such as "the high silicon iron known as duriron or must be coated with a protecting coating of some kind. Such alloys having high acid or alkali resisting qualities are very hard and brittle, but of low tensile strength and when the castings are of considerable length (as is thecase here) or size, and are subject to tension strains, there is a tendency to crack, particularly under widely varying temperature conditions causing extreme contraction and expansion, and under strains incident to vibration. Cooling or heating tubes such as the one here shown and described, may run seven or eight feet or more in length, and when supported only at one end, are particularly subject to breakage, such breakage being greater when the tubes are used in positions other than a vertical one. The object of the present invention is to provide a tube in which the danger of breakage in the brittle acid resisting casing, even under the most unfavorable conditions, is practically eliminated. Briefly stated, this result is accomplished by combining with the brittle casing of corrosive resisting metal, a member of wrought metal which is utilized to take all the tensile strains to which the device is exposed, and which places the casing throughout under compressive strains, which it is well able to resist. One embodiment of the invention is shown in the accompanying drawing wherein:

The figure is a longitudinal section through the improved construction, as applied to a tank containing a fluid to be cooled or heated.

In the drawing 1 is the cast cylindrical 1923. Serial No. 643,547.

casing of the device, which is made of relatively brittle acid and alkali resisting composition such as duriron, heretofore referred to as containing a high percentage of silicon. This casing fits in an opening or perforation in the tank wall 9 and is provided with a shoulder 11 engaging the inner surface of the tank wall as indicated.

The ends of the casing'are open and are provided with the closure caps 2 and 3, the inner cap 2 being of the same corrosion resistingcomposition as the casing, and the other cap 3 being preferably of cast iron. Cast into the wall of the cap 2 is awrought iron sleeve l. The two caps are clamped. together by the wroughtiron tube which is perforated adjacentits inner end as illustrated, and. threadedinto the sleeve 4.

The outer end of the tube is also threaded and carries the clamping nuts 6 and 7, which secure, the cap 3 and the spiderS respectively'in clamping position. A pipe 10 leads through the wall of the cap 3, one

of the pipes 5 and acting as the inlet for the heating or cooling fluid, and the other as the outlet.

. In assembling the parts, the pipe- 5 is screwed into the sleeve 4' of the cap 3, and

the two heads are assembled upon the casing. The nut 6 is then tightened to place the tube 5 under tension and the casing 1 under compression, and to secure tight joints between the caps and easing ends, such parts being ground or provided with gaskets to secure against leakage. The casing is next inserted through the wall of the tank, and thespider '8 and nut 7 applied to clamp the parts in position. The pipe 10 is then screwed intothe cap.

By the foregoing arrangement, the rela tively fragile casing is placed under compression throughout and is never subject to tensile strains, incident to position or vibration, tending to fracture it. Even the strain in the portion of the casing outward from the shoulder 11 may be made a compressive one by screwing the nut 6 down harder than the nut 7 thus overcoming the tendency of the spider to place a tensile strain on the portion of the casing referred to. O Other advantages of the construction will be readily apparent to those skilled in the art.

hat I claim is.

1. In combination in a temperature regulating tube, a cylindrical casing of corro-' sion resisting'metal composition open at the" ends, means for securing the outer end -of the casing in the Wall of a container, a closure cap also of corrosion resisting metal composition for the inner end of the tube, a closure cap for the outer endof the easmg, a tube of relatively strong tough metal under tension clamping the tWo caps to-- gether perforated at its inner end and extending 'through'the outer cap, and a connection'for fluid leading to the interior'of the casing at its outer end.

2. In combination in a temperature regulatingtube, acylin-drical casing of corrosioirresisting' metal composition open at the ends and prorided with a shoulder for en gaging the inner surface'of the Wall of a container surrounding the opening in Which the'tube isfmounted, aclo'sure cap also of corros'ion'resisting lnillil'lillfOl' the inner 'surfaceof the Wall of the container in op position to said shoulder, a nut threaded on saidtube for forcing said clamping member inward, and a connection for fluid leadi-ngto" the-interior of the casing.

, 3. In combination in a temperature regulating tube, acyli'ndrical casing of corrosion resisting metal composition open at the ends, means for'sec'uring the outer end of the casing in the Wtlll'Of a container, a closure capalso of corrosion resisting material forthe inner end of the tube, having a threaded sleeve of wrought metal seated in its Wall, a closure cap for the outer end of the casing, a perforated tube of relatively strong tough metal threaded into said sleeve at one end and extending through said outer closure cap at its other end, means threaded onsaidtube for applying clamping pressure tothe' 'outer closure cap and placing said tube under tension, and a connection-for fluid leading to the interior of the casing.

In testimony whereof, I have hereunto subscribed my name this '2'nd day of June, 1923.

i PEIRCED. SCHENCK. 

